Fan and regulator for thrashing-machines



(No Model.)

F. F. LANDIS.

FAN AND REGULATOR FOR THRASHING MACHINES. No. 482,846. Patented Sept.20, 1892.

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UNiTED STATES PATENT QFFICEIITZLT FRANK F. LANDIS, OF WAYNESBOROUGH,PENNSYLVANIA.

FAN AND REGULATOR FOR THRASHlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 482,846, datedSeptember 20, 1892.

Application filed April 2, 1892' erial No. 427,525. (No model.)

To all whom it may concern.-

Be it known that I, FRANK F. LANDIS, a citizen of the United States,residing at Waynesborough, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements in Fansand Regulators for Thrashing-Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as Will'enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to the fans and blastregulators used inthrashing-machines; and it consists in the novel construction and OOIII-bination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a plan view of the fan, showing the casingin section. Fig. 2 is a cross-section taken on the line so a; in Fig. 1.Fig. 3 is a similar cross-section and shows a modification.

Thrashing-machines of large size have to be built of considerable width,and in making long fans of the width of these machines it has been founddifficult to secure a uniform pressure of blast all across the machine,because the air which enters at the ends of the fan is driven off beforeit reaches the central parts of the fan-blades, and this difficulty isnot satisfactorily overcome by making the middle of the fan of largerdiameter than its ends. According to the presentinvention the fan ismade in sections and works in a casing of peculiar construction, ashereinafter described, so that the blast is regulated and kept uniformin pressure all across the machine.

A is the fan-casing, provided with a single outlet-passage a of the fullwidth required by the machine.

13 is the fan-shaft, journaled in the bearings Z), secured to the sidesof the machine, and provided with a pulley b for driving it in the usualmanner.

0 are the sections of the fan. These sections are alike and consist ofblades and arms securing the blades on the shaft B in the usual manner.Two sections 0 are shown in Fig. 1 of the drawings; but it is obviousthat more than two sections can be used, if desired.

Inlet-openings D for air are provided in the fan-casing A at the outerends of the sections of the fan, and an inletopening D for air isprovided in the casing A bet-ween each two sections. This opening D ispreferably on the lower side of the casing and extends as far around itas is necessary to obtain the requisite area. The air is drawn in by thesections of the fan and is forced up the outlet-passage a, common toboth sections, as indicated by the arrows in the drawings.

E are heads inside the casing on each side of the opening D, and e arethe inlet-openings in the heads. Two inclined boards e are secured toeach other and to the said heads and project within the passage 0!, sothat the air cannot escape backward from the said passage; but theseboards e may be dispensed with, if desired.

The ends of the fan-blades preferably revolve within the inlet-openingsD, and each inlet-opening is preferably provided with an internally-projectin g flange to prevent the escape of air from the casing.

The projecting flanges of the heads E are similar to the flanges on theends of the easing, and they may be formed on the heads or they may bethe ends of the ring F carried by the heads E. The ring F is providedwith holes f to admit the air to the inlet-openings c.

Fig. 3 shows asimple modification in which the heads E'are dispensedwith, and the ring F is carried by short pipes g, which connect theholes f with the air outside the casing. The pipes g are carried by thecasing, and the cutting of a single large opening D is avoided and thecasing is not weakened.

Vhat I claim is- 1. The combination, with the sections of the fansecured upon the fan-shaft, of a fan-casing provided with an outletcommon to the said sections and inlets at the ends of the fan andbetween its sections and a perforated ring supported in the casing andarranged between the said fan-sections, substantially as set forth.

2. The combination, with the sections of the fan secured upon thefan-shaft, of a fan-casing provided with an outlet common to the saidsections and inlets at the ends of the fan and between its sections,aring provided with holes, and short pipes supporting the said ring inthe casing and connecting the holes in ICO the ring with the said inletsin the casing between the sections, substantially as set forth. 3. Thecombination, with the sections of the fan secured upon the fan-shaft, ofa fan-cas- 5 ing provided with a single outlet common to the saidsections and a ring encircling the adjacent ends of the fan-blades ofeach two sections, said ring being provided with holes between thesections for the ad mission of air, substantially as set forth. 10

In testimony whereof Iaifix my signature in presence of two witnesses.

' FRANK F. LANDIS. Witnesses:

ALF. N. RUssELL, ALEX. S. ENGLE.

